mRNA injected into deltoid cells lasts about 72 hours and do not travel to distant sites in the body.

I get asked about this all of the time, so I went to find the primary science on this.

A couple of quick tweets

1/
The first paper I can find on this was in @ScienceMagazine in 1990 and showed the half-life of RNA in muscle cells to be less than 24 hours- RNA encoding the luciferase protein was injected into mouse quads and luciferase was undetectable at 60 hours. pubmed.ncbi.nlm.nih.gov/1690918/

2/
In 2007, a study agreed:

Luciferase-encoding mRNA injected into human ear dermis peaked transcription at 17h and was undetectable at 3 days (panel d).

They also looked for luciferase expression at distal sites in the ear and saw none (panel e).

pubmed.ncbi.nlm.nih.gov/17476302/

3/
So when people ask you how long mRNA lasts in the body, you can now confidently tell them, having seen some of the primary literature.

Others know this area much better than me, and if there are better studies, I am all ears.

fin/
Because @laxswamy:

Luciferase is a reporter protein that lights up, making it easy for scientists to detect expression in experiments.

It has nothing to do with Beelzebub; it just has an unfortunate name. It was discovered in 1887 by Raphael Dubois.

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More from @gbosslet

22 Jul
Earlier this summer I was adamant that school would be reasonable without masks, even for the ages for which vaccines are not available.

I have changed my tune. A quick 🧵as to why.

1/
Most data suggest that the SARS-CoV-2 virus affects kids in a generally quite benign way.

I know people get frustrated when COVID is compared to the flu, but for kids the data suggest the comparison is reasonable. And this accounts for "long COVID" and MIS-C.

2/
So when I suggest that masks should be mandatory in school for kids, I am not worried about the health of my unvaccinated 6 and 11 year olds.

I am worried about it causing widespread community transmission and overwhelming hospitals.

Again.

3/
Read 7 tweets
13 Apr
This week our manuscript on the role of in-person school on community spread of SARS-CoV-2 in Indiana was published online in Clinical Infectious Diseases.

This thread will outline our findings.

manuscript: bit.ly/3mIXvC5

1/17
This was a truly interdisciplinary effort.
@micahpollak (@iunorthwest): economics
Jeong Jang (@IUmedschool): biostats
@rebekah_roll (@IUmedschool): data gathering
Mark Sperling (@iunorthwest education): education
@deliriumkahn: analysis

I just sort of herded cats.

2/17
I’m going to target this thread to a wide audience, so my description of our work may leave some wanting more detail. The detail is in the online version and the supplement. Happy to answer any questions on the work as they come up.

3/17
Read 17 tweets
4 Apr
Over the last about 6 years I have adopted the practice of not checking email AT ALL on vacation.

When I mention this, many scoff and say that would never work for them.

I said the same thing when I started.

Join me for a 🧵 about my journey to vacation email freedom.

1/
I have a relatively busy job as a clinician, fellowship director, and assistant dean for faculty development/affairs.

I average 70-100 emails per day.

So committing to not checking it for a week (or 2!) away is admittedly no small task.

I adopted this practice in stages.

2/
My initial state was bad- there was one vacation in which I was answering emails on my computer on the beach as my kids were frolicking in the ocean.

This was when I knew I had to make a major change. This was my low point.

3/
Read 14 tweets
3 Apr
Bread and butter pickles are disgusting.
Also why don’t they make chicken broth with 33% MORE sodium?

I feel like they are ignoring most of the market here.
And cottage cheese is complicated. Matching curd size and %milk fat gets complicated. Like I need a 2x2 grid to figure that shit out.
Read 4 tweets
6 Feb
It's tax time!!

Today I sit down and slot through a bunch of forms and discover whether or not I win or lose the tax lottery.

A 🧵about online filing and the fact that is is free for most despite the fact that no one knows this.

Includes links with how to do it for free.

1/
IN 2003, the IRS partnered with a group of companies called the "Free File Alliance", which is a group of tax software companies to help Americans file their taxes ONLINE for FREE.

freefilealliance.org

2/
They intentionally deeply buried the links for the free filing software that most everyone signed up for the NON-FREE version of the software and assumed it wasn't free.

It is supposed to be 100% free.

@propublica wrote a terrific article on this bit.ly/3jnVSIt

3/
Read 7 tweets
4 Feb
Headlines about a recent study point out that a recent study of the Astra Zeneca vaccine appears to slow transmission of the SARS-CoV-2 virus.

nyti.ms/39HJ78f

I think it is important to show what this study does and does not imply.

1/7
You can find the manuscript here: bit.ly/3cF1Fbe

NOTE THAT THIS IS A PREPRINT AND HAS NOT YET UNDERGONE PEER REVIEW.

2/7
Vaccines are good at reducing symptomatic #COVID19.

What people really want to know is if they can take off their masks once they have the vaccine. After I am vaccinated, if I don’t have symptoms, could I be infectious?

I will refer to this as slowing asymptomatic spread.

3/7
Read 8 tweets

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